Abrufen von PickerData-Daten von einem Rest WebService

Question

Ich bekomme Daten von einem Web-Service und mein PickerData-Array speichert keine Werte, wenn ich sie außerhalb des Json-Parsing-Blocks verwenden möchte. hier ist mein Code

var pickerData: [String] = [String]() 
var mag : String! 
override func viewDidLoad() { 
    super.viewDidLoad() 
    NomMAG.alpha = 0 








     // \(detectionString) 
     let str = "http://vps43623.ovh.net/yamoinscher/api/getAllMag" 
     let url = NSURL(string: str)! 

     let task = NSURLSession.sharedSession().dataTaskWithURL(url) { (data, response, error) -> Void in 

      if let urlContent = data { 

       do { 
        let jsonObject = try NSJSONSerialization.JSONObjectWithData(urlContent, options: []) 
        if let jsonResult = jsonObject as? [String:AnyObject] { 
         if let Pick = jsonResult["magasin"] as? [[String:String]] { 
          for categorie in Pick { 
           self.mag = categorie["libelle"]! 
            self.pickerData.append(magasin) 

            //self.pickerData = [(self.produits[0].magasin)] 


          } 
          print(self.pickerData) 
          dispatch_async(dispatch_get_main_queue()) { 
           self.picker1.reloadInputViews() 
           // print(self.produits.count) 
          } 
         } 
        } 
       } catch { 
        print("JSON serialization failed", error) 
       } 
      } else if let connectionError = error { 
       print("connection error", connectionError) 
      } 

     }  
     task.resume() 


    //print(produits.count) 
    //pickerData = ["Item 1", "Item 2", "Item 3", "Item 4", "Item 5", "autre"] 
    //print(self.pickerData) 
    self.picker1.delegate = self 

    self.picker1.dataSource = self 


    // Do any additional setup after loading the view. 
} 


override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 

// The number of columns of data 
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int { 
    return 1 
} 

// The number of rows of data 
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int { 
    return self.pickerData.count 
} 

// The data to return for the row and component (column) that's being passed in 


func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? { 

    return self.pickerData[row] 
} 


func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) { 



    if pickerData[row] == "autre" 
    { 
     //print(row) 

     NomMAG.alpha = 1 
    } 
    else 
    { 
     //print(row.description) 
     NomMAG.alpha = 0 
    } 



} 

ich meine picker voll mit den Daten erhalten möchte ich aus dem JsonParsing gewonnen und das PickerData Array außerhalb des Blocks des Codes des

Json null ist

Answer 1

Connect delegate und dataSource der Picker Ansicht im Interface Builder und ersetzen viewDidLoad mit

var pickerData = [String]() 

    override func viewDidLoad() { 
    super.viewDidLoad() 

    let str = "http://vps43623.ovh.net/yamoinscher/api/getAllMag" 
    let url = NSURL(string: str)! 

    let task = NSURLSession.sharedSession().dataTaskWithURL(url) { (data, response, error) -> Void in 
     if let urlContent = data { 
     do { 
      let jsonObject = try NSJSONSerialization.JSONObjectWithData(urlContent, options: []) 
      if let jsonResult = jsonObject as? [String:AnyObject], 
      magasin = jsonResult["magasin"] as? [[String:String]] { 
      // filter valid items, map them to an array and filter empty strings 
      self.pickerData = magasin.filter { $0["libelle"] != nil }.map { $0["libelle"]! }.filter { !$0.isEmpty} 
      } 
      dispatch_async(dispatch_get_main_queue()) { 
      self.picker1.reloadAllComponents() 
      } 
     } catch { 
      print("JSON serialization failed", error) 
     } 
     } else if let connectionError = error { 
     print("connection error", connectionError) 
     } 

    } 
    task.resume() 
    } 

Sie haben die NomMAG Zeile hinzufügen